20043420011 has 4 divisors (see below), whose sum is σ = 20043712512. Its totient is φ = 20043127512.

The previous prime is 20043419971. The next prime is 20043420037. The reversal of 20043420011 is 11002434002.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20043420011 - 2¹⁸ = 20043157867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20043420091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18101 + ... + 201033.

It is an arithmetic number, because the mean of its divisors is an integer number (5010928128).

Almost surely, 2^20043420011 is an apocalyptic number.

20043420011 is a deficient number, since it is larger than the sum of its proper divisors (292501).

20043420011 is a wasteful number, since it uses less digits than its factorization.

20043420011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292500.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20043420011 its reverse (11002434002), we get a palindrome (31045854013).

The spelling of 20043420011 in words is "twenty billion, forty-three million, four hundred twenty thousand, eleven".